diff --git a/README.md b/README.md
index 9458a83..be1def7 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ jobs:
         uses: actions/checkout@v2.3.4
       - name: Deploy schemas to BigQuery
         uses: Atom-Learning/bigquery-upload-action
-        env:
+        with:
           gcp_project: 'gcp-us-project'
           dataset_id: 'dataset-id'
           table_id: 'table-id'
diff --git a/conftest.py b/conftest.py
index 6932831..e0a6766 100644
--- a/conftest.py
+++ b/conftest.py
@@ -3,24 +3,24 @@
 
 @pytest.fixture
 def dataset_id(monkeypatch):
-    return monkeypatch.setenv("dataset_id", "foo_dataset_id")
+    return monkeypatch.setenv("INPUT_DATASET_ID", "foo_dataset_id")
 
 
 @pytest.fixture
 def gcp_project(monkeypatch):
-    return monkeypatch.setenv("gcp_project", "foo_gcp_project")
+    return monkeypatch.setenv("INPUT_GCP_PROJECT", "foo_gcp_project")
 
 
 @pytest.fixture
 def table_id(monkeypatch):
-    return monkeypatch.setenv("table_id", "foo_table_id")
+    return monkeypatch.setenv("INPUT_TABLE_ID", "foo_table_id")
 
 
 @pytest.fixture
 def bq_rows_as_json_path(monkeypatch):
-    return monkeypatch.setenv("bq_rows_as_json_path", "foo.json")
+    return monkeypatch.setenv("INPUT_BQ_ROWS_AS_JSON_PATH", "foo.json")
 
 
 @pytest.fixture
 def credentials(monkeypatch):
-    return monkeypatch.setenv("credentials", "{'secret': 'value'}")
+    return monkeypatch.setenv("INPUT_CREDENTIALS", "{'secret': 'value'}")
diff --git a/plugin_scripts/config.py b/plugin_scripts/config.py
index b3ea25e..bedd20c 100644
--- a/plugin_scripts/config.py
+++ b/plugin_scripts/config.py
@@ -11,10 +11,6 @@ def nullthrows(arg: Optional[T]) -> T:
 
 
 class Config(NamedTuple):
-    """
-    Names of the arguments are env var names read from
-    """
-
     gcp_project: str
     dataset_id: str
     table_id: str
@@ -23,18 +19,20 @@ class Config(NamedTuple):
 
 
 def _validate_env_variables() -> None:
-    for env_var in Config._fields:
+    for param in Config._fields:
+        # GH actions prefixes the arguments passed to `with` with `INPUT_` and puts upper case.
+        env_var = "INPUT_" + param.upper()
         if not os.environ.get(env_var):
-            raise Exception(f"Missing `{env_var}` config")
+            raise Exception(f"Missing `{param}` config")
 
 
 def read_config() -> Config:
     _validate_env_variables()
-    gcp_project = os.environ.get("gcp_project")
-    dataset_id = os.environ.get("dataset_id")
-    table_id = os.environ.get("table_id")
-    bq_rows_as_json_path = os.environ.get("bq_rows_as_json_path")
-    credentials_as_json = os.environ.get("credentials")
+    gcp_project = os.environ.get("INPUT_GCP_PROJECT")
+    dataset_id = os.environ.get("INPUT_DATASET_ID")
+    table_id = os.environ.get("INPUT_TABLE_ID")
+    bq_rows_as_json_path = os.environ.get("INPUT_BQ_ROWS_AS_JSON_PATH")
+    credentials_as_json = os.environ.get("INPUT_CREDENTIALS")
     credentials = json.loads(nullthrows(credentials_as_json))
 
     return Config(
diff --git a/plugin_scripts/requirements.lock b/plugin_scripts/requirements.lock
index 7a3427f..3e99221 100644
--- a/plugin_scripts/requirements.lock
+++ b/plugin_scripts/requirements.lock
@@ -9,7 +9,7 @@ google-cloud-core==2.3.1
 google-crc32c==1.3.0
 google-resumable-media==2.3.3
 googleapis-common-protos==1.56.4
-grpcio==1.54.2
+grpcio==1.56.0
 grpcio-status==1.47.0
 idna==3.3
 packaging==21.3
diff --git a/tests/test_config.py b/tests/test_config.py
index 4c14266..f938609 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -4,6 +4,7 @@
 
 # Fixtures imported automatically from conftest.py file
 
+
 def test__validate_env_variables_missing_dataset_id(
     table_id, gcp_project, credentials, bq_rows_as_json_path
 ):